ORIENTED HDPE FILMS WITH SKIN LAYERS
Readily castable high density polyethylene (HDPE) films, preferably containi ng broad molecular weight distribution HDPE resin having treated upper skin layers and untreated lower skin layers, preferably coextruded, on each side. The treated upper skin layer is derived from a polymer, e.g. ethylene-...
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| creator | O'BRIEN, JEFFREY JAMES BADER, MICHAEL JOHN |
| description | Readily castable high density polyethylene (HDPE) films, preferably containi ng broad molecular weight distribution HDPE resin having treated upper skin layers and untreated lower skin layers, preferably coextruded, on each side. The treated upper skin layer is derived from a polymer, e.g. ethylene-propylene-butene-1 terpolymer, and the lower skin layer is derived from a polymer such as ethy lene- propylene-butene-1 terpolymer and LDPE compounded with silicone oil. Such sk in layers provide a film which is readily castable while maintaining the desirable properties of HDPE including dead fold, twist rete ntion, TD tear and moisture barrier. The films are cast, and oriented in the solid state up to about two times in the machine direction a nd six times or more in the transverse direction to give films having good dead-fold characteristics making them highly suited for packagin g, particularly for dry foods. |
| format | Patent |
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The treated upper skin layer is derived from a polymer, e.g. ethylene-propylene-butene-1 terpolymer, and the lower skin layer is derived from a polymer such as ethy lene- propylene-butene-1 terpolymer and LDPE compounded with silicone oil. Such sk in layers provide a film which is readily castable while maintaining the desirable properties of HDPE including dead fold, twist rete ntion, TD tear and moisture barrier. 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| language | eng ; fre |
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| subjects | AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
| title | ORIENTED HDPE FILMS WITH SKIN LAYERS |
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